Process and system for computation and adjustment of optimum ign

Details Process and system for computation and adjustment of optimum ign Process and system for computation and adjustment of optimum ign

1980-04-17

1981-11-17

Myhre, Charles J.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123419, 123422, 123423, 123415, 73 35, 73DIG4, F02D 504, F02P 1102

Patent

active

043005039

ABSTRACT:
A novel process and system for computing and adjusting the optimum ignition advance in an internal combustion engine wherein knocking is detected by means of an accelerometer rigidly fastened to the cylinder head of the engine. An output from the accelerometer is integrated, converted into digital form, and processed by processing circuits to derive an average value C proportional to n preceding knocks and two comparison thresholds S.sub.1 and S.sub.2, each a linear function of the preceding average value C. The accelerometer output integrated and converted into digital form is compared with each of these thresholds and the existence of a preknocking or audible knocking value is deduced and then used to act on the programmed electronic ignition advance.

REFERENCES:
patent: 4002155 (1977-01-01), Harned et al.
patent: 4061116 (1977-12-01), Saida et al.
patent: 4163385 (1979-08-01), Kato et al.
patent: 4240388 (1980-12-01), Omori et al.

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